1144875621 has 16 divisors (see below), whose sum is σ = 1538712000. Its totient is φ = 757158528.

The previous prime is 1144875617. The next prime is 1144875629. The reversal of 1144875621 is 1265784411.

It is not a de Polignac number, because 1144875621 - 2² = 1144875617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1144875621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1144875629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 575190 + ... + 577176.

It is an arithmetic number, because the mean of its divisors is an integer number (96169500).

Almost surely, 2^1144875621 is an apocalyptic number.

It is an amenable number.

1144875621 is a deficient number, since it is larger than the sum of its proper divisors (393836379).

1144875621 is a wasteful number, since it uses less digits than its factorization.

1144875621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3428.

The product of its digits is 53760, while the sum is 39.

The square root of 1144875621 is about 33836.0107134396. The cubic root of 1144875621 is about 1046.1310741839.

The spelling of 1144875621 in words is "one billion, one hundred forty-four million, eight hundred seventy-five thousand, six hundred twenty-one".